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The year, make and model info would help. Also need to know if the blower motor is working, just not getting any heat, or not changing function between defrost, dash or floor vents.
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∙ 10y ago
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Why would your heat only work on defrost?
ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?
When i turn on the defrost no air seems to go the windshield?
no heat to front window went defrost is on
Can air conditioner be bypassed on 2001 Taurus without affecting heat or defrost?
yes, however, if the ac does not work then you will be unable to blow cold air on a hot steamy windshield to defog it.
How would the repair of the heater and air conditioning not blowing be made on a 1994 acura integra?
I own a 1994 acura integra and the heater/air conditioning blower is not working, I can not defrost my windows and the heat does not blow. What is wrong and how can the problem be fixed.
Why is my defrost stuck on my blazer?
The air door under the Blazers dash could be stuck, or there could be a vacuum leak on the engine. The door opens and closes from vacuum, directing the air from heat to defrost.
Does cabin air filter make the defogger work?
NO It has NOTHING to do with defrost.
Will defrost work without air cond hook up?
Yes
Why does cold air only blows from defrost vents on a 1995 Chrysler concord?
Cold air from the defrost indicates that the air doors are in the wrong position. The doors are vacuum controlled in most vehicles. check the vacuum system for a leak.
Your 2001 Hyundai elantra is not blowing any heat out whats wrong with it It was working fine yesterday?
One possibility is that the air conditioning is on. My 2001 Elantra automatically starts the air when the fan setting is put to defrost. I have to remember to turn it off.
Air control won't switch from heat to defrost in your 1999 navigtor?
It's a bad vaccum line
How heat pump used to heat the building?
Imagine a window AC unit installed backwards, rejecting heat indoors while air conditioning the world, this is a heat pumps heat mode. As the unit is air conditioning in the cool outdoors eventually the outdoor coil will ice up requiring a defrost cycle, defrost is the AC mode except the outdoor fans off to assist with the defrosting. A defrost cycle is time and temperature initiated, time or temperature terminated.
Does the internal intake not work when the fan is set on defrost for all Plymouth Grand Voyagers?
Defrost setting pulls all outside air.
